I have the RMS tubular uppers on my 68 A-body. With the heim jointed ends, they really free up alot of movement and appears to ride smoother on the road. I also went with 1.0" torsion bars which are not harsh at all. Mopars are already under sprung from the factory. Bigger bars help tremendously. Add front and rear sway bars and you'll be lovin life!